Calculation of water vapor enthalpy?
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How does ASPEN calculate the enthalpy of water, and why is the calculated enthalpy of water negative? How should the reference state for enthalpy value be set
The enthalpy of water vapor refers to the enthalpy of water vapor at a specific temperature and pressure. The formula for calculating the enthalpy of water vapor is: H_vap = (Cp_vap * T) + (R * T * log(P / P_ref)) + (H_fg), where: H_vap: enthalpy of water vapor ； Cp_vap: Specific heat capacity of water vapor ； T: Water vapor temperature ； R: Gas constant ； P: Water vapor pressure ； P_ref: Reference pressure ； H_fg: The exothermic enthalpy value of water.